CentOS中在/etc/rc.local添加开机自启动项启动失败

应项目要求需要在开机的时候启动自己的Agent程序，想当然的直接就往/etc/rc.local当中添加启动命令，结果重启之后发现什么都没有发生....一开始还以为是Python路径的问题，结果改成绝对路径之后还是一样，一番搜索之后发现原来是权限问题，执行chmod a+x /etc/rc.d/rc.local解决问题。

其实/etc/rc.local的说明当中已经说的很清楚了， /etc/rc.local只是为了兼容而设置的，若要执行需要为/etc/rc.d/rc.local添加执行权限，看来还是不能慌呀，项目再忙也不能乱了手脚，本来这种稍微看下文档说明就解决了的问题，结果还是瞎折腾了一下，磨刀不误砍柴工，古人诚不欺我。

1. /etc/rc.local实为/etc/rc.d/rc.local的软连接

[root@10-10-50-109 ~]# ls -l /etc/rc.local 
lrwxrwxrwx 1 root root 13 May 26 09:38 /etc/rc.local -> rc.d/rc.local

2. /etc/rc.d/rc.local默认权限为不可执行

[root@10-10-50-109 ~]# ls -l /etc/rc.d/rc.local 
-rw-r--r-- 1 root root 473 Apr 13 03:57 /etc/rc.d/rc.local
[root@10-10-50-109 ~]# 

3. /etc/rc.local当中的说明

[root@10-10-50-109 ~]# cat /etc/rc.local 
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.

touch /var/lock/subsys/local
[root@10-10-50-109 ~]#